git.ipfire.org Git - thirdparty/openwrt.git/blob

   1 From e99d1768b77e77182d5e7ac9c335c7d8cbd88963 Mon Sep 17 00:00:00 2001
   2 From: Jonathan Bell <jonathan@raspberrypi.com>
   3 Date: Mon, 20 May 2024 14:45:37 +0100
   4 Subject: [PATCH 1096/1135] DTS: bcm2712: don't assume L1 sub-state support at
   5  chip level
   6
   7 L1 sub-states require the connection of the CLKREQ# auxiliary signal
   8 which is a PCB-level decision, and also depends on the vagrancies of
   9 adapters/interposers/slots that may exist between the chip and the
  10 endpoint.
  11
  12 If this parameter is present, and the RC driver sees an L1 substate
  13 capability in the endpoint, then the result is a broken link if CLKREQ#
  14 isn't end-to-end connected - regardless of the state of the L1.x enable
  15 bits in the RC.
  16
  17 Board-specific methods (HAT+ overlay, board DTB) should define this
  18 property if required.
  19
  20 Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
  21 ---
  22  arch/arm/boot/dts/broadcom/bcm2712.dtsi | 2 --
  23  1 file changed, 2 deletions(-)
  24
  25 --- a/arch/arm/boot/dts/broadcom/bcm2712.dtsi
  26 +++ b/arch/arm/boot/dts/broadcom/bcm2712.dtsi
  27 @@ -1063,7 +1063,6 @@
  28                                       0x00 0x00000000
  29                                       0x10 0x00000000>;
  30
  31 -                       brcm,enable-l1ss;
  32                         status = "disabled";
  33                 };
  34
  35 @@ -1124,7 +1123,6 @@
  36                                       0x00 0x00000000
  37                                       0x10 0x00000000>;
  38
  39 -                       brcm,enable-l1ss;
  40                         status = "disabled";
  41                 };
  42